Nathaniel chateffi



UNITED STATES PATENT Erro- NATHANIEL OHATER, on NEW YORK, N, Y.

BLACK-PIGMENT FROM -ANTHRAGiTE court.

Specification forming part of Letters Patent No. 1,368, dated October 5,1839.

To all whom it may concern;-

Be it known that I, NATHANIEL CHATER, of the. city and State-of NewYork, have discovered and invented a. new pigment which I call PatentBlack and I do hereby declare that the following is a full and exactdescriplion, of the same It is intended as a substitute'for ivory-black,and answers every purpose for which that articlecan be employed, butmore brilliant in its hue, and infinitely cheaper, It. is made from theanthracite coal, and may be reduced to powder either iii its dry state,in oil, or in .water' in any descriptionof mill; The method which I useto prepare the same is togrind it in water in' either horizontal oredge. stone mills, and to float itofl into vats or pits, similar to thegrinding of whiting froin which'it is taken CHATER, hereto subscribe myname, in the pres-- ence of the witnesses whose names are hereuntosubscribed, on the 12th day of June, A;

" NATHL. OHATER. Witnesses:

STEPHEN U. BEAUCHANT,

T. P. BALL.

